ATA 100? Or not?

[snarfll]

Hi All!,
Just built a new system using the Asus A7V board with Duron 600. This board comes with onboard Promise ATA 100 capabilities. My Hard Drives are: Quantum Fireball,20Gig,7200Rpm LM(ATA66 compatible) as master. My second hard Drive is WD 10Gig,5400Rpm(also ATA66) as slave.
My question is,should i use the 40 pin/80 conductor cable and connect my drives to the ATA100 board connector? Or just use the standard 66/33 connector? The manual is pretty vague about how to set this up and whether or not i would gain from using it. My CD drives are: PLextor 8x4x32 CD-RW and Pioneer 16x DVD. Would any gain be realized if i use another 40/80 cable and connect these to the ATA100 secondary connector?
Any thoughts will be greatly appreciated.
Thanks Guys!

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When in doubt,,pull the plug!!

[bistro]

Use the 40/80 on the hd's--you'll have less "cross-talk" and it will improve performance. With the CD's, it doesn't make any difference really, but I'd use a 40/80 on those also just for consistency.

[snarfll]

Thanks for the input bistro.
Guess my only concern now,is whether or not i may have problems with burning CD's if both CD drives are on the same cable.But,(thinkin' out loud), hopefully the 40/80 cable may make it more compatible. Have heard elsewhere(don't remember where exactly),that it's better not to have the CD-ROM on the same cable as the burner. But, will give it a' shot and see how it works out.
Thanks again..

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When in doubt,,pull the plug!!